21104228291690 has 32 divisors (see below), whose sum is σ = 38211781224960. Its totient is φ = 8391982486464.

The previous prime is 21104228291617. The next prime is 21104228291723. The reversal of 21104228291690 is 9619282240112.

It is a super-2 number, since 2×21104228291690² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5092964 + ... + 8255103.

It is an arithmetic number, because the mean of its divisors is an integer number (1194118163280).

Almost surely, 2^{21104228291690} is an apocalyptic number.

21104228291690 is a deficient number, since it is larger than the sum of its proper divisors (17107552933270).

21104228291690 is a wasteful number, since it uses less digits than its factorization.

21104228291690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13349006.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 21104228291690 in words is "twenty-one trillion, one hundred four billion, two hundred twenty-eight million, two hundred ninety-one thousand, six hundred ninety".